JP2531363B2 - Waterproof connection flange - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting flange for connecting a waveguide or the like, and more particularly to a connecting flange having a waterproof function.

[0002]

2. Description of the Related Art Conventionally, for waterproofing a connecting portion such as a waveguide installed outdoors, as shown in FIG. 2, an O-ring type packing 11 is fitted into a groove provided on a contact surface of a connecting flange 12. It was done by things. Such a waterproofing method using an O-ring type packing is widely used in general because the waterproofing inside the waveguide can be surely maintained and the O-ring itself has a high sealing effect and is inexpensive. It was

[0003]

However, in such a conventional waterproofing method, the inside of the waveguide or the like can be kept waterproof, but the connecting flange, especially the threaded portion is waterproofed. I couldn't do that. For this reason, rainwater and the like easily enter the threaded portion of the connection flange, causing rust, which makes it difficult to remove the connection flange, and also causes the screw to be damaged during removal. There has occurred.

The present invention has been proposed in order to solve the problems of the prior art, and not only the inside of the waveguide to be connected but also the waterproofing of the threaded portion of the connection flange. The purpose of the invention is to provide a waterproof connection flange.

[0005]

In order to achieve this object, a waterproof type connection flange of the present invention has a cylindrical portion integrally enclosing an open end and an inner wall of a screw hole of the connection flange, and a contact surface of the connection flange. A packing consisting of a base part to be formed, a screw hole and a contact surface side of the connection flange, and a structure in which a storage part for storing the cylindrical part of the packing and the base part is provided, and preferably, A ring-shaped projecting portion is provided on the side of the base of the packing that contacts the flange.

[0006]

According to the above construction, the packing integrally encloses the screw hole opening end of the connection flange, the screw hole inner wall and the contact surface, so that rainwater and the like can be prevented from entering the screw portion.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the waterproof connecting flange according to the present invention will be described in detail below with reference to the drawings. FIG. 1 is a sectional view of an essential part showing an embodiment of this waterproof connection flange. In this figure, reference numeral 1 is a waterproof packing, and as shown in the drawing, a cylindrical portion 1a integrally enclosing the opening end and the inner wall of the screw hole 3 formed in the connection flange 2 and the contact surface of the connection flange 2 are provided. It is composed of a base portion 1b which is located, and these are integrally molded. In this case, the tubular portion 1a
Are provided in the same number as the number of screw holes provided in the flange, and the cylindrical portions 1a are erected at equal intervals on the outer peripheral portion of the base portion 1b. A ring-shaped ridge 1c concentric with the center of the packing is provided on the flange contact surface side of the base 1b of the packing 1 in order to enhance the waterproof effect. When the protrusion 1c is provided inside the screw hole 3, the waterproof effect inside the waveguide or the like can be enhanced, and when provided outside the screw hole 3, the connecting flange 2c is provided.
It is possible to enhance the waterproof effect of the screw part. In this embodiment, it is provided on both the inside and outside, but it is possible to provide only one of them depending on the purpose of use. In addition,
In order to prevent the packing 1 from falling off from the connection flange 2, it is desirable that one end of the base portion 1b has a shape that encloses the outer peripheral portion of the connection flange 2.

Reference numeral 4 denotes a screw, which is inserted into the screw hole 3 of the connection flange 2 and further screwed into the screw hole of the other flange to be connected. Reference numeral 5 denotes a storage portion for storing the packing 1, and a tubular storage portion 5a for storing the tubular portion 1a of the packing 1.
And a base storage portion 5b in which the base portion 1b is stored. These accommodating portions 5a and 5b are formed on the inner peripheral surface of the screw hole and the outer peripheral portion on the contact surface side of the connection flange 2.

According to the waterproof connection flange of the present invention having such a structure, the packing 1 is housed in the housing portion 5 and the opening end of the screw hole 3, the inner wall of the screw hole and the contact surface of the connection flange 2 are integrally formed. Since it is covered and crimped between the connection flange 2 and the other flange by the screw 4, not only the inside of the waveguide or the like to be connected but also the screw portion of the connection flange 2 is completely waterproofed.

[0010]

As described above, according to the waterproof type connection flange of the present invention, not only the inside of the waveguide or the like connected by the connection flange but also the threaded portion of the connection flange can be reliably waterproofed. .

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part showing an embodiment of a waterproof connection flange according to the present invention.

FIG. 2 is a sectional view of an essential part showing a conventional connection flange.

[Explanation of symbols]

 1 Packing 1a Cylinder part 1b Base part 1c Projection part 2 Connection flange 3 Screw hole 4 Screw 5 Storage part 5a Cylinder storage part 5b Base storage part 11 O-ring type packing 12 Connection flange 13 Screw hole 14 Screw

Claims (2)

(57) [Claims] 1. A packing comprising a tubular portion integrally enclosing an opening end of a screw hole of a connection flange and an inner wall, and a base portion located on a contact surface of the connection flange; and a screw hole and a contact surface side of the connection flange. A waterproof connection flange characterized in that a storage portion is provided for storing the tubular portion and the base portion of the packing, respectively. 2. The waterproof connection flange according to claim 1, wherein a ring-shaped protrusion is provided on the flange contact surface side of the base portion of the packing.